![]() C2A is also able to display field images transferred from the ESO DSS and STScI DSS ( Digitized Sky Survey) servers over the Internet. Regarding deep sky objects, C2A is provided with 3 catalogues: the Revised New General Catalogue and Index Catalogue (credit Wolfgang Steinicke - see the site Revised New General Catalogue and Index Catalogue), the Catalogue of Principal Galaxies ( PGC 2003), the catalogue of the Saguaro Astronomy Club (SAC) version 8.1 (credit SAC - see Saguaro Astronomy Club) as well as a catalogue of deep sky objects based on the RNGC and NGC2000 catalogues. ![]() Finally, C2A integrates an asterism catalogue and it can display artificial satellite positions using orbital elements in the TLE format. C2A is able to access directly over the Internet the catalogues ArasBeAM (for spectral observation of Be stars - see the site ), Exoplanet Transit Database (to plan exoplanet transit observations - see the site ) and IAU Meteor Showers (which provides all the known and suspected meteor showers - see the site Meteor Data Center). For photometry purpose, C2A natively integrates the Loneos catalogue ( UBVRI photometry of faint field stars, which is part of the standard distribution package). C2A is also an easy to use general purpose Planetarium software with many functions.Ĭ2A is able to display the following catalogues: SAO, GCVS, WDS, Gliese and Hipparcos (all four provided with the standard program distribution), Guide Star, Tycho-2 (both can be downloaded from this site in the Downloads page), USNO-SA1.0, USNO-A2.0, USNO-B1.0, UCAC1, UCAC2, UCAC3, UCAC4, NOMAD, PPMXL, CMC15 and URAT1 (which are not provided with the distribution because of their size). An important objective of this software is to take into account the main catalogues available to professional and amateur astronomers in order to prepare observations on small fields as well as astrometry and photometry works. It is only available for the Microsoft Windows Operating System (all versions). ![]() C2A ( Computer Aided Astronomy) is a Planetarium software that allows you to build detailed views of stellar fields. ![]()
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